*{
	margin: 0px;
	padding: 0px;
}
.box{
	width: 200px;
	height: 100px;
	background: red;
	position: relative;
}
.box .son{
	width: 500px;
	height: 200px;
	position: absolute;
	top:0px;
	left: 200px;
	background: blue;
	display: none;
	
}